Help! Really unusual engine or ecu problem.

Originally Posted by IAmTheStig

At the brake pedal under the dash there are switches that are activated when the brake pedal gets pressed. If the lame brackets they are mounted to get bent or are out of adjustment, they could activate when the brake pedal is barely depressed or not depressed at all, causing the ecu to think you are pressing the brake and the gas at the same time, and when this happens, the ecu will always cut engine torque to allow for the braking.